Monotelephone-relay transformer.



P. E'. H'EINA.

M01\TOTELEPH01\IEI RELAY TRANSPORMBR. 4 APPLICATION FILED MALZ, 190,8.

930,753. A P Patented Aug. 10,1909.

2 SHEETS-SHEET 1.

VVV-VN ESSES:

y P.'E. HEINA.A

l MoNoTELBPHoNE RELAY TMNSPORMER.

APPLICATION FILED MAR.24, 1908. I

930,753. Patented Aug.. 10,1909.

ZSHEBTS-SHEET 2. Y

' lNvENToR, BPAU L EDOUARD HEINA,

Attowleg.

nutren A sra-fra PAUL EDOUARD HINA, PARIS, FRANCE.

` Mouc'rELnrnoiin-nnnar rneusrosivisn.

Application le March 24, 1'968. 'Serial No'. 123,064.

To all whom it may concern:

Be it known that l, PAUL EDoUARD 1 HEINA, a citizen of France, residing at Paris,

in the said Republic, have invented 'new and useful Iglu rovements in Monetelephone-Re-v lay Trans ormers, (forwhicli I have obtained a patent 1n France, No. 376,155, bearing date t March 27, 1907, and in Hungary, N o. 41,093,

bearing dateApril, 1907,) of which the following is a speciiication.

This invention relates to a mono-tele hone relaytransformer, which has a circular p ate of of the equilibrium lever.

magnetizable metal, the vibrations of which are'used to roducevariation's inthe equilibrium of tie relay and too crate simultaneously several printing mec anisms `of a receiving station in the same circuit and in both directions. I

For the'purpose of explaining the invention, 'the accompanying drawings show in Figure 1 a vertical section through the mono- .telcphone. IFig. 2 is a diagram illustrating the whole of the relay. Fig. 3 is a diagram illustrating the application of the invention to telegraphic printing mechanisms such as that known as the Hughes-system, Fig.4 4` is aplano a mono-telephoneplate.' Fig. 5 shows in sectionalf elevation a modification Y Fig. 6 is a plan thereof. .Figs 7 and S are detail views drawn to an enlarged scale, showing yin side elevation and. front elevation respectively the arm carrying both the lever and' its adjusting spring, the front elevation being partly in. section on the line A-B ofFig. 6. The same reference characters indicate. the same parts in the various 'figures The mono-telephone relay transformer having acircular plate comprises a cylindrical box 1 mounted as shown in Fig. 1 on three rubber tubes S and containing an arm ature, of Which the core 2 is surrounded by a coil 3 as in an ordinary telephone, but the mono-telephone diaphragm 4 instead of being incascdV around its periphery, is simply .supported on three points at vits nodalcin cumierence corresponding with the first harmonic off its fundamental note, the sup ports being rods 5 iiedto slides 6 each adapted to be shifted along the radius of the circular platform 7 upon Which they rest. rlhe diameters of the diaphragmsare determined in such a manner as to in. ke' for the iirst harmonic of the sound cor isponding with the determined numbers w, 'n.lf, vibrations stepped [from seinitone to Speeication of Letters Patent.

Patented Aug. 1o, 190e.

` semitone. Each of the diaphragms is eX- actly 1n accord with a transmitter of alterequal to that of the iirst harmonic ofthe diaphragm 4, the latter.,y resonates energeticallyl while it remains almost unaffected iii' this period diilers by a quantity corretius the plate dnly reinforces a single sound. These mono-telephorc relay transformers having circular plates are thus characterized by the sound of their iirst harmonic.

` To transform the sound waves produced by one the relays whose plate vibrates under the influence ol' signals produced by periodical electric currents ol' the saine period as that vof the iii-st harmonic ol` thc plate, there is caused torest upon the center ol' the plate the end of a l ever S terminating in a platinum Contact 9. This lever which may oscillate in jeweled bearings on a pillar 10 is adjusted by aeounter Weight 11 in sucha manner that its speed of vibration may be slower than that of the, plate 4 in ordcii not to generate its own vibrations in'the'plate. When lthe coil 3 is traversed by a suitable `periodic electric current and the plate 4 is thus made to vibrate the lever 8 can not follow these vibrations so that there is obtained between these two resistance. Il the plate 4 and the lever 8 suitable relay such as a dilierential relay 12, 13, 14 indicated 1n Fig.A 2 the movable tongue it will not then be actuated by any current and in consequence the third local. circuit,

the printing mechanism of any suitable type, will remain o en. Il' the equilibrium ol' the dilerential re ay is modifiedin consequence ol' the varia-tions of the contact between the lever 8 and the plate'4,the tongue 15 will close the circuitol' the battery 16, that is to say, the printing mechanism-willbe operated' when the corresponding plate is in vibration. l When all the transmitters at :1. transmitting station are at rest, ail the'generators ol" periodic electric currents are in movement s onding with ene-sixth of thc note'or less that df the battery or the like 1 6, in whichare passed through thecoil 3, the period being. I

parts either an interruption or a variation of are respectively connect-cdv With the ter-- minals and (Fig. 1) of a circuit of any 15 ol' this relay will be in equilibrium, when, the lever 8 and the plate 41 are in contact, for

, the current generated in known manner in the coil ting up-vibrations in the correspon dm g plate the secondary s ol' the transformer F is transmitted through the line L and passes through at the receiving station, thus set- 4. These vibrations upset the equilibrium otl the relay and the'tongue 15 closes the circuit 16 ot' the printing mechanism 17, Ithat is to say the electro-magnet 19 operates the lever 20 which presses the paper strip 21 on the printing disk. l

Various devices are .used to adjust the intensity in the relay transformer. .For instance there can be intercalated in series with or in derivation to the coil 3 a rheostat 22,` or the distance of the plate 4 vtrom the core 2 may be varied; or the intensity in the dil'- i'erential relay operated by acontinnous current and actuating the printingmechanism may bc varied with aid ol' an adjustableI rheostat 22-'inserted as indicated in Fig. 2.

, 'operated tuning fork. 45.x

By such means, the apparatus is adjusted moreor less. This adjustment may be ei'- i'ected. without interruptingr the receipt ol' the message.

Twov ol' these mono-telephone relay transformers are shown diagrammatically in Fig. 2,. `.'[n Fig. 1, 4 is the vibrating plate, 2 the polarized magnet and 8 the lever. The receiving circuit Cr which contains these transformers; is connected with 'the line LT either directly or through a differential transi'o1'iner'.l`-d. It may be supposed that there are 12 lmono-telephone re ay transformers presentingI successive steps ol' a semii one and connected in series in derivation or in a mixed manner. .These apparatus are adjusted once l'or all; when once thc tone ol' t ho plate 4 is determined, it does not vary more than that ol'A the corres )ending electrically 'lille apparatus therefore do not require any adjustment in the course of use and superintendence is not re Auired.

"igs 5, 6, 7, and 8 show a modi'ication oi the construction of the oscillating` equilibrium lever described above, this modilica- .tion allowing exact adjustment of the. lever and a hastening of its descent on to the contact at the vends of each vibrationwithout sensibly increasing its pressure on the plate. For this purpose, the support of the lever is provided with an arm carrying a light adjustahle spring which terminates in a very soft pad oi felt; this )ad hears upon the lever with an exceedingly light pressure such that the proper vibra-tions ot' the. plate are not disturbed. The lever is mounted on a steel pivot turning in jewcl'ed hearings so that owing to the absence of wear and the durability of the parts friction is reduced to porting the lever, S is the lever, l l. its counter-eight and 4 the plate on the center 3l of which the lever rests. lus-trad oll mounting the lever directly on the support 1() as in the previous case, it is carried hy an arm 25 to which is also iixed a light sprino- 2G the tension thereof being adjustah e by a fine adjustment screw 24 also carried by anarm 25; the spring' 2o has on its l'ree end a pad 23 of very downy felt ol' the kind known as the Pyrenesc cloth; the threads oll this pad exert very slight pressure on the lever 8. The parts 9 and 3l which come into contact with each other are preferably made of pure silver, the actual contact surfaces heiner burnished so that lthe metal may he as homogeneous as possible. 'lhe counter weight 11, instead ot heing mounted directly on an extension oi' the lever 8 is carried hy a screw threaded rod is" mounted on the end of lever 8; the latter is supported. on the arm 25 in the manner indicated on an enlarged scale in Figs. 7 and 8. 'lhe construction consists of a steel pivot 27, the ends of which turn in jewels 2% and which extend through jeweled bearings 2E); wire .'30 conducts the current lroin the mass olE the apparatus to the lever.

ltlono-teleplnnes have heen ap )lied before. only in such a manner that tire signals are rendered audible at the receiving station, the Morse code being used, for example, but they have never been used helorc to serve for printing the messages at, the` receiving station by means of such isms as the Hughes, Baudotor the like. 'lhis important result is obtained aecordhr; to the present inventipn by means ol' the combination ol' the mono-teleplnme with the oscillatingl balance lever herein described, the equilibrium and mass ol' this lever beingso determined that the number ol oscillationspropcr to the lever is inlinitely small relatively to the number ot vibrations proper to the plate, so that the pressure exerted on the. plate by the contact which determines the operation of the relay shallirot interfere with the oscillations proper' to the plate. The lever is so constructed that it makes two or three oscillations per second while the plate makes from 250 to vibrations in the, same time.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to he. performed, -I declare that what l claim is 1. A m no-telephone relay transformer comprising a circular plato of a magnetizablc metal adapted to vibrate in known manner, under the action of periodic electric currents, three supports carrying the said plate and lying` in the nodal (',ircninlerence corresponding with the first harmonic of the funda'- inental note of the plate, radial slides carrying the said'supports, and a. lever adapted to printing .mechan- @escasa i comprising jaV ero ar plate o magnetizableVy metal adaptedtvibratejin known mannerv under. the actipn of periodic-electric currents,` three supports Acarrying the said `plate and lying in the nodal circumference cornespond- 10 ingV with the. first harmonie,oi ;..1`,lie@funda-4 mental note of the-plate, radial`s`lide`s carry`' in the saidsnp Orts, a lever adapted to c' ate aron'd a Vorizo'ntal axis land balanced' 1in such a. mapnerthat its speedof vibration@ s'slower thanv that 'of the said plate,. a'fs'up-- :port carrying the said lever, anl arm mount' ed o'n-the said support, a light-adjustable spring mounted onthe said arm, and a."

of the'said spring and adapted to bear a'ga'instf. the said leverfwith a very 'slight pressure. l

. ad I of very soft downy felt carried at!theirs'e'glid.`A

jcomyirising'a rcnlar plate of magnetizable metal adapted to vibrate in known 'man'ner,` `under :the action of periodic electric cnr-- rents, three su ports carrying thesaid plate and lying in tiie nodal circumference .corre- .S onding with'theiirst harmonic of the' fun-f amental note of'. the plate, 'radial slides carryiv` A,the s'aid'su' portsla'le'ver. adapted to oscv' te around aioizontal axis and bal- ;anced a'o'hthat'its speed of 'vibration is slower ,than thatf'of the said plate,A 'a steel pivot' car. rying'th "fsaidlleverand -jeweledlbearings cturxrf. p r. r"In .testimonyfwheredf l have signed my name to this specification in the presence of Vtwo subsoribing ivfitnesse's.A .l p *l Y PAUL EDOUARD HEINA..

z VWitnesses:

JULES Farms,

3. A monoftelephone relay transfo'riner v 'i y EUGNE Plenos;-

wherinj; them- 1 @meel4 pivot, ig adapted, to as, 

